mynode/packages/tools/checkGeneratedFiles.test.ts

import { readFile } from 'fs/promises';
import { isAutoGeneratedFile } from './checkGeneratedFiles';
import { join } from 'path';

const readTestFile = () => readFile(join(__dirname, 'checkGeneratedFiles.test.js'), 'utf-8');

describe('checkGeneratedFiles', () => {
	it('should detect an older auto-generated .js file processed by eslint', () => {
		const generatedFile = `
'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
exports.default = function() {};
// # sourceMappingURL=test.js.map
`.trimStart();
		expect(isAutoGeneratedFile(generatedFile)).toBe(true);
	});

	it('should detect a newer auto-generated .js file', async () => {
		const fileContent = await readTestFile();
		expect(isAutoGeneratedFile(fileContent)).toBe(true);
	});

	it.each([
		// The correct comment should ignore the check
		['ignore: generated check', true],
		// A different comment should not ignore the check
		['do not ignore: generated check', false],
	])('should allow ignoring the generated check (case %#)', async (commentText, shouldIgnore) => {
		let fileContent = await readTestFile();
		// Add the comment just after the first line:
		fileContent = fileContent.replace('\n', `\n// ${commentText}\n`);
		expect(isAutoGeneratedFile(fileContent)).toBe(!shouldIgnore);
	});
});